EASA SIB 2020-04
Lithium Batteries used in Emergency Locator Transmitters
EASA Safety Information Bulletin 2020-04 is an airworthiness bulletin addressing lithium batteries used in Emergency Locator Transmitters (ELT) from HR Smith (Technical Developments) Ltd and Techtest Ltd. It applies to specific ELT part numbers including 500-12(), 500-27(), 500-32-2Y, 500-32-2Y-S, 500-32-2Y-S-D, and battery packs A01477 and A0696Y, installed on or carried aboard aircraft certified under CS-23, CS-25, CS-27, and CS-29 or equivalent regulations. The bulletin highlights potential fire risks from thermal runaway in these lithium batteries and provides safety recommendations without mandating regulatory action.